A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 6610-01-426-3514
NSN 6135-00-377-9165
NSN 5996-00-932-5301
NSN 5835-01-388-5198
NSN 6220-01-356-1056
NSN 5998-00-161-8608
NSN 6645-01-370-5264
NSN 5965-01-551-1900
NSN 5999-01-170-4738
NSN 6130-00-857-4491
NSN 5835-01-466-5496
NSN 5996-01-265-3657